Main Program

All programs must have a main

Most trivial program is

      int main() {
        return (0);
      }

or, different style

      int main()
      { return (0);
      }

• under UNIX, suffix is .c

• main() is a function called by the OS

• this main() takes no arguments

• braces "{" and "}" denote body of function

• main returns 0 to the OS (success!)

• a statement ends with semi-colon (";"), otherwise completely free form